hearsub
Real-time YouTube subtitle translation and AI dubbing extension
Score
60
User Rating
3.0
Free/Trial Support
Not Supported
Starting Price
--
Last Updated
Sep 12, 2026
Overview
What is hearsub?
HearSub is a browser extension that provides real-time YouTube subtitle translation, bilingual captions, and synchronized AI dubbing without requiring users to upload the full video. It follows video playback to generate translated captions and natural-sounding dubbing, while supporting multi-speaker detection and preservation of the original background audio.
What is hearsub used for?
Top Features
- Real-time translated captions
- Bilingual subtitle display
- Synchronized AI dubbing
- Multi-speaker detection
- Original background audio preservation
- No full-video downloads or processing wait
- Support for 42 dubbing languages
- Playback-synchronized translation
How to use hearsub?
Install HearSub as a browser extension, open a foreign-language video on YouTube, select the target language, and start playback. HearSub detects the source language and keeps translated captions and AI dubbing synchronized with the video.
Alternative Tools
No alternative tools found
Pros & Cons
No Data
Use Cases
- Follow online courses in foreign languages
- Watch coding tutorials while listening in your preferred language
- Understand interviews and long conversations more easily
- Keep up with international business news
- Watch documentaries without losing context
- Understand foreign-language Shorts and trending content
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